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Evolution of microstructure and mechanical properties in Zn–Cu–Ti alloy during severe hot rolling at 300 °C

Published online by Cambridge University Press:  25 July 2017

Shengya Ji ,
Shuhua Liang ,
Kexing Song ,
Hongxia Li  and
Zhou Li
Shengya Ji
Affiliation:
Faculty of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China; School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China; and Department of Materials Engineering, Henan Institute of Technology, Xinxiang 453003, China
Shuhua Liang
Affiliation:
Faculty of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China
Kexing Song*
Affiliation:
School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
Hongxia Li
Affiliation:
School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
Zhou Li
Affiliation:
School of Materials Science and Engineering, Central South University, Changsha 410083, China
*
a) Address all correspondence to this author. e-mail: kxsong@haust.edu.cn
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Abstract

The present investigation aims to explore the evolution of microstructure and mechanical properties in Zn–Cu–Ti alloys during severe hot-rolling deformation. Twin deformation and dynamic recrystallisation are two important deformation modes of Zn–Cu–Ti alloys during hot rolling at 300 °C. Twin deformation and dynamic recrystallisation (DRX) appear one after the other. They not only consume the deformation stored energy but also inhibit initiation and growth of cracks. The elongation rate of Zn–Cu–Ti alloys has a rising trend with the increase in hot-rolling deformation. It is mainly due to grain refinement caused by increasing the ratio of DRX and twin deformation. The tensile strength of Zn–Cu–Ti alloys is found to decrease with the increase in hot-rolling deformation. This is because the solid-solution strengthening effect of copper is weakened by more deformation-induced precipitation of ε phase (CuZn5). The solid-solution strengthening effect of copper plays an important role in the strengthening effect of Zn–Cu–Ti alloys.

Keywords

severe hot rollingdynamic recrystallisationdeformation-induced precipitationmechanical propertiesZn–Cu–Ti alloy
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 16 , 28 August 2017 , pp. 3146 - 3155
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

Contributing Editor: Jürgen Eckert

References

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